Why did cities lead to the creation of governments?

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.

What is the relation between the hover dam and the gold rush

Brainliesttt asap!me : describe the responses to terrorism in the united states.